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My PC was working fine. One day, I plugged in my USB printer and shorted out the PC.
I restarted and it worked until today. Now the PC won't turn on.
I tested the power supply on its own with a PSU tester and seems to work fine. I also installed a brand new power supply and nothing.
I have noticed that when I have the PSU plugged into the tester on its own, it works fine. As soon as I plug in the auxillary 2x2 pin on the MOBO, it shorts out.
Would appreciate any advice.
1Umm, are you saying you had the PSU's mobo connector plugged into a tester while the 2x2 was plugged into the mobo?! Also, can you describe the problem in more detail? What happens when you press the power button? Do the fans spin? – David Schwartz – 2012-07-09T22:26:47.537
If the tester says your psu is fine then it may well be that some of the components on your motherboard are dead. Try removing components such as graphics card and hard drives, leaving just CPU and memory and see if it boots or at least powers up. – Mokubai – 2012-07-09T22:34:08.053
Pull the motherboard out of the PC tower and place it on a anti-static sheet, even the foil that the motherboard comes in will work. Plug in the PSU and see what happends – Darius – 2012-07-09T22:34:33.010
@Darius, NO! Applying power while the motherboard has numerous points shorted out via foil is a surefire way to blow stuff up! – psusi – 2012-07-09T23:17:36.103
@psusi Maybe my choice of words was bad, I meant the plasticky pouch the motherboards usually come in. Other then that my claim still stands. – Darius – 2012-07-09T23:22:07.527
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@Darius, those antistatic bags are actually conductive. That's how they dissipate any excess charge. They're not very conductive, but putting a motherboard on one and powering it up isn't a good idea.
– Wyzard – 2012-07-09T23:26:50.953@Darius, no, it doesn't. Again, shorting out points on the bottom of the board and applying power is BAD. – psusi – 2012-07-09T23:26:51.817
Yes, i would plug in the 24 pin to the tester (fans and drives would go on) and as soon as I plugged in the 2x2 all would turn off. When I press the power button nothing happes (no fans, drives, nothing) I have pulled the mobo out, placed on a box and plugged in the psu and nothing. – Mario Garcia – 2012-07-09T23:28:00.467
@MarioGarcia, plugging in power to a board that is already partially powered is also a good way to blow it up. – psusi – 2012-07-09T23:29:09.647
1The 2x2 should be plugged into the tester, as well as the 20/24 plug at the same. None of those plugs should be plugged into the mobo when you test the PSU. – Logman – 2012-07-09T23:34:15.920
I have tried two PSUs, do you think i need a new mobo? – Mario Garcia – 2012-07-09T23:37:41.510
You probably do need a new mobo, though I have seen a psu tester plugged in like that and the mobo was fine -> yes I did it, when I got my first tester =) – Logman – 2012-07-10T00:32:51.557